Make various views SetShape() methods take an unique_ptr.

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index eebeb87db63cc3c2553bee4b98bbacff3a5f844c..ca92c5bd33937456f9f0fb89b183c792f92e93e8 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -557,8 +557,8 @@ void Widget::StackBelow(gfx::NativeView native_view) {
   native_widget_->StackBelow(native_view);
 }
 
-void Widget::SetShape(SkRegion* shape) {
-  native_widget_->SetShape(shape);
+void Widget::SetShape(std::unique_ptr<SkRegion> shape) {
+  native_widget_->SetShape(std::move(shape));
 }
 
 void Widget::Close() {